Can you pass the three questions in the world’s quickest IQ test?

Most IQ tests involve pages and pages of questions, many of which seem to involve strange shapes.

But there’s a simpler test for intelligence, which has been circulating this week in the wake of Donald Trump’s offer to take an IQ test.

The Congnitive Reflection test was designed by psychologist Shane Frederick in 2015, and is a series of three simple questions, designed to work out if someone is of above-average intelligence.

It’s built to test intelligence by seeing if people can override their own ‘gut instinct’ – and avoid an obvious, but wrong answer.

The Cognitive Reflection Test

1. A bat and a ball cost £1.10 in total. The bat costs £1.00 more than the ball. How much does the ball cost?

2. If it takes five machines five minutes to make five widgets, how long would it take 100 machines to make 100 widgets?

3. In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?